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soc/nvidia/tegra210: add console UART helper functions 

These small helper functions aim at supporting the user setting
CONFIG_CONSOLE_SERIAL_TEGRA210_UARTx.

Change-Id: I71423a0424927ff383bcbf194c9fbaa452d810a1
Signed-off-by: Andre Heider <a.heider@gmail.com>
Reviewed-on: https://review.coreboot.org/23795
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Andre Heider 2018-02-16 12:44:42 +01:00 committed by Martin Roth
parent c9aa0c3d07
commit 86fd16cc0b
1 changed files with 113 additions and 0 deletions
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113
src/soc/nvidia/tegra210/include/soc/console_uart.h Normal file
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/*
* This file is part of the coreboot project.
*
* Copyright 2018 Andre Heider <a.heider@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __SOC_NVIDIA_TEGRA210_INCLUDE_SOC_CONSOLE_UART_H__
#define __SOC_NVIDIA_TEGRA210_INCLUDE_SOC_CONSOLE_UART_H__
#include <soc/clock.h>
enum console_uart_id {
UART_ID_NONE = -1,
UART_ID_A = 0,
UART_ID_B = 1,
UART_ID_C = 2,
UART_ID_D = 3,
UART_ID_E = 4,
};
static inline enum console_uart_id console_uart_get_id(void)
{
if (IS_ENABLED(CONFIG_CONSOLE_SERIAL_TEGRA210_UARTA))
return UART_ID_A;
if (IS_ENABLED(CONFIG_CONSOLE_SERIAL_TEGRA210_UARTB))
return UART_ID_B;
if (IS_ENABLED(CONFIG_CONSOLE_SERIAL_TEGRA210_UARTC))
return UART_ID_C;
if (IS_ENABLED(CONFIG_CONSOLE_SERIAL_TEGRA210_UARTD))
return UART_ID_D;
if (IS_ENABLED(CONFIG_CONSOLE_SERIAL_TEGRA210_UARTE))
return UART_ID_E;
return UART_ID_NONE;
}
static inline void *console_uart_clk_rst_reg(void)
{
switch (console_uart_get_id()) {
case UART_ID_NONE:
return NULL;
case UART_ID_A:
return CLK_RST_REG(clk_src_uarta);
case UART_ID_B:
return CLK_RST_REG(clk_src_uartb);
case UART_ID_C:
return CLK_RST_REG(clk_src_uartc);
case UART_ID_D:
return CLK_RST_REG(clk_src_uartd);
case UART_ID_E:
return CLK_RST_REG(clk_src_uarte);
}
return NULL;
}
static inline uint32_t console_uart_clk_src_dev_id(void)
{
switch (console_uart_get_id()) {
case UART_ID_NONE:
return 0;
case UART_ID_A:
return CLK_SRC_DEV_ID(UARTA, PLLP);
case UART_ID_B:
return CLK_SRC_DEV_ID(UARTB, PLLP);
case UART_ID_C:
return CLK_SRC_DEV_ID(UARTC, PLLP);
case UART_ID_D:
return CLK_SRC_DEV_ID(UARTD, PLLP);
case UART_ID_E:
return CLK_SRC_DEV_ID(UARTE, PLLP);
}
return 0;
}
static inline void console_uart_clock_enable_clear_reset(void)
{
switch (console_uart_get_id()) {
case UART_ID_NONE:
return;
case UART_ID_A:
clock_enable_clear_reset_l(CLK_L_UARTA);
break;
case UART_ID_B:
clock_enable_clear_reset_l(CLK_L_UARTB);
break;
case UART_ID_C:
clock_enable_clear_reset_h(CLK_H_UARTC);
break;
case UART_ID_D:
clock_enable_clear_reset_u(CLK_U_UARTD);
break;
case UART_ID_E:
clock_enable_clear_reset_u(CLK_U_UARTE);
break;
}
}
#endif /* __SOC_NVIDIA_TEGRA210_INCLUDE_SOC_CONSOLE_UART_H__ */